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nano-pdf

Edit PDFs with natural-language instructions using the nano-pdf CLI.

58

Quality

68%

Does it follow best practices?

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Adds up to 20 points to the overall score

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SecuritybySnyk

Passed

No findings from the security scan

Fix and improve this skill with Tessl

tessl review fix ./skills/nano-pdf/SKILL.md
SKILL.md
Quality
Evals
Security

Quality

Content

87%

Reviews the quality of instructions and guidance provided to agents. Good implementation is clear, handles edge cases, and produces reliable results.

The body is an efficient, actionable quick-start for a simple single-task skill, with a concrete command and sensible operational notes. Its only real gap is the lack of an explicit validation feedback loop for a destructive document-editing operation.

Suggestions

Add an explicit validation/retry step, e.g. open the edited PDF, verify the change, and if it failed or is off-by-one, re-run with the alternate page-number convention.

Clarify the page-numbering ambiguity up front (state the default and when to use the other) rather than only as a fallback note.

Mention in-place vs. output-file behavior so users know whether the original PDF is modified.

DimensionReasoningScore

Conciseness

The body is lean — a one-line purpose, one executable command, and two operational notes — with no explanation of what a PDF is or how libraries work; every token earns its place.

3 / 3

Actionability

Provides a fully executable, copy-paste-ready command with a concrete example ('nano-pdf edit deck.pdf 1 "..."'), matching the 'fully executable code/commands; copy-paste ready' anchor.

3 / 3

Workflow Clarity

The single action is unambiguous and a 'sanity-check' note is present, but PDF editing is document manipulation and the skill only offers a soft check plus an off-by-one retry rather than an explicit validate→fix→retry loop, capping it at 2.

2 / 3

Progressive Disclosure

Under 50 lines with no need for external references, and it is well-organized with a 'Quick start' section, so the simple-skill allowance applies and it scores 3 without bundle files.

3 / 3

Total

11

/

12

Passed

Description

50%

Based on the skill's description, can an agent find and select it at the right time? Clear, specific descriptions lead to better discovery.

The description cleanly states what the skill does and ties it to a specific CLI, but it omits any 'Use when...' trigger guidance and only surfaces a single action with limited keyword coverage. It is competent but stops just short of being fully complete or distinctive.

Suggestions

Add an explicit 'Use when...' clause, e.g. 'Use when the user wants to edit a PDF page with a plain-language instruction.'

Expand action and trigger vocabulary to cover common phrasings like 'forms', 'document', or '.pdf'.

List one or two more concrete capabilities (e.g. rotate, redact, reorder pages) to raise specificity.

DimensionReasoningScore

Specificity

Names the PDF domain and one concrete action ('Edit PDFs'), but does not list multiple specific actions, matching the 'names domain and some actions, but not comprehensive' anchor rather than the multiple-action level.

2 / 3

Completeness

It states what the skill does ('Edit PDFs with natural-language instructions using the nano-pdf CLI') but has no explicit 'Use when...' trigger, which the guideline caps at 2; it is not a 1 because the 'what' is clearly stated.

2 / 3

Trigger Term Quality

Includes the natural term 'PDFs' but omits common variations users might say (forms, document, .pdf), fitting 'some relevant keywords but missing common variations'.

2 / 3

Distinctiveness Conflict Risk

The nano-pdf CLI and natural-language editing give it a niche, but without explicit triggers it could still overlap with other PDF skills, matching 'somewhat specific but could still overlap'.

2 / 3

Total

8

/

12

Passed

Validation

81%

Checks the skill against the spec for correct structure and formatting. All validation checks must pass before discovery and implementation can be scored.

Validation13 / 16 Passed

Validation for skill structure

CriteriaDescriptionResult

metadata_version

'metadata.version' is missing

Warning

metadata_field

'metadata' should map string keys to string values

Warning

frontmatter_unknown_keys

Unknown frontmatter key(s) found; consider removing or moving to metadata

Warning

Total

13

/

16

Passed

Repository
Bitterbot-AI/bitterbot-desktop
Reviewed

Table of Contents

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